When you install BackOffice 4.5, using the integrated setup, SQL server and SNA server are configured for Per-Server licensing.
This means that you can't use a BackOffice CAL, without first changing the licensing mode to Per-Seat.
To use these products, you must either purchase individual product CALs or switch the licensing mode.
use Control Panel / Licensing on each server
use the License Manager tool, in the Administrative Tools folder, remotely, if you are a Domain Admin.
If your Licensing is messed up, see tip 0127.